After editing the message in the quick edit dialog (not the full editor), the pre-entered tags dissapear.
Not sure if it's just me.

Using the Marina Teal Light theme.

Yea! it's a Know BUG & it's literally eating my brain ....
It seams that that the TAG system & QuickEdit System are not compatible with each other for now.
This is only for First Post of a topic , does not affect subsequent post.
So kindly bare with us and edit first post in full editor only.